Check-valve.



T. A, DE VILBISS.

CHECK VALVE.

APPLICATION FILED MAR} 13, 1908,

Patented Mar. 2, 1909,

l NVENTdR. I

W'ITNESSES: f8 6. 10% W Q 7% may? ' tion and positive seating of UNITED STATES PATENT OFFICE.

THOMAS A. DE VILBISS, OF TOLEDO, .OHIO, ASSIGNOR TO THE DE VILBISS MANUFACTUR- ING COMPANY, OF TOLEDO, OHIO, A CORPORATION OF OHIO.

CHECK-VALVE.

Specification of Letters Patent.

Patented March 2, 1909.

To. all whom it may concern:

'Be it known that I, THOMAS A. Dr: VILBISS, a citizen of the United States, and a resident of Toledo, in the county of Lucas and State of Ohio, have invented a certain new and useful Check-Valve; and I do hereby declare the following to be a full, clear, and exact descri tion of the invention, such as will enable 0t ers skilled in the art to which it appertains to make and use the same, reference being had to the accompanying drawings, and to the figures of reference marked thereon, which form a part of this specification.

My invention relates to check-valves, and articularly to the class of valves adapted or use in connection with compression bulbs or the like, but is not restricted to such use.

In the manufacture of this type of valves it has been customary to form one end of the valve plug or holder with spaced prongs or fingers which are bent over to form means.

for retaining the valve member in its chamber and at the same time allowing the air or water, -as the case might be, to pass around the valve and escape from the chamber. Owing to the expense and slowness of manufacture of this form of valve, when made of brass or other hard metal, due to the separate operations necessary to form the spaces between the pron s or fingrers thereof, they have, as a rule, een cast 0m lead, which at its best forms valves of crude and unfinished appearance and construction.

The object of my invention is to obviate the objections incident to the manufacture and use of the above form of valve by the provision of a simple and highly eflicient valve of this ty e, which can be cheaply and quickl manu actured of brass or other suitab e material and has the retaining means for its valve member formed by a single operation of a suitable stamping die, and which also has its valve retaining means fashioned to provide a more erfect operatfie valve than IS the case with the forms of valve above described. v

The operation, construction and arrangement of the parts of my invention are fully describedin the following specification, and illustrated in the accompanying drawings, in which,

Figure 1 is a central longitudinal section 'of the plug or holder of my invention as it appears before the walls of the valvechamber are-acted upon to form the valve retaining means thereof. Fig. 2 is a side elevation of the plug incompleted state. Fig. 3 is an inner end view thereof, and Fig. 4 is a section taken on the line E E in Fig. 3.

Referrin to the drawings, 1 designates the plug or ho der, which is of suitable form to adapt it to be inserted in an end of a compression bulb or in a tube associated therewith, or with'any other suitable means for creating a forced draft therethrough. The plug or holder 1 is provided in one end with the central bore or inlet opening 2 and in its other end with a valve-chamber 3, which has a valve-seat 4 at the inner end of the bore or opening 2 and carries a valve 5 of disk or other suitable form adapted when seated to close the communication between said opening and chamber. The chamber 3 is provided at its outer end with the restricted outlet opening 6, the margin of which is corrugated, as shown at 7, to provide openings or crevices 8 through which the fluid may escape laterally into the outlet opening 6 when the valve is lifted from its seat and held against the inner side of such corrugated portion by the action of the fluid thereon. It will be apparent that the size and shape of the escape openings 8 de pends upon the depth and manner of formin of the corrugations.

hile the corrugated end of the plug or holder 1 may be formed in any suitable manner, a preferable and very simple method of formin the same consists in first making the chain er 3 cup-shaped in form with its walls tapering to a rather thin edge, as shown in Fig. 1, and then operating on this wall with a suitable tool or die so as to compress it inwardly to provide the restricted outlet opening 6 and form the corrugated margin 7 at a single operation.

It will be apparent that this construction forms a cheap and very efficient form of valve, which is easy and rapid of manufacture; and also that a back pressure of fluid on the valve will be constrained to pass through the restricted central outlet opening 6 of the. valve-chamber and be applied directly to the central portion of the valve 5, thus tending to hold it more firmly to its.

seat than is the case with the constructions of valve-casings or plugs heretofore'used in Ind which the bending over of the valve retaining prongs or fingers form openings over the edge of the valve. 7

The drawing in of the valve-chamber wall in the manner described also contracts or shapes that end of the plug in conical-form, thus facilitating an insertion thereof in the article with WhlCh it is to be associated.

I wish it understood that I do not desire to be restricted to theexact details of construction and arrangement of the parts shown, as obvious modifications will occur to persons skilled in the art.

Having thus described my invention, what I claim as new and desire to secure by Letters Patent, is, s

A check-valve, comprising a metal member having a bore therethrough which is abruptly enlarged at one end to form a valve which fluid may escape from the valve-.

chamber, said crevices having their outer ends closed whereby to constrain the fluid passing therethrough to laterally enter the restricted outlet opening, and a valve mounted in the valve-chamber.

In testimony whereof I have hereunto signed my name to this specification in the,

presence of two subscriblng witnesses.

THGMAS A. DE VILBISS. Witnesses:

- C. W. OWEN,

HAZEL B. HIETT. 

